| 单词 | pickering series |
| 释义 | > as lemmasPickering series attributive and in the genitive, esp. in Pickering series. Designating (the lines of) a series in the spectrum of ionized helium with wave numbers represented by 4R(1/42 − 1/m2) (where R is the Rydberg constant and m = 5, 6,…), of which the first line has a wavelength of 1013 nanometres and the series limit is at 365 nanometres.Observed by Pickering in 1896 ( Astrophysical Jrnl. 4 369, 5 92). ΘΚΠ the world > matter > physics > atomic physics > decomposition of light, spectrum > [adjective] > referring to discoveries by specific scientists Balmer1891 Zeeman1898 Pickering1914 Lyman1922 Brackett1930 1914 Philos. Trans. (Royal Soc.) A. 214 227 The lines of the ‘4686’ and the associated Pickering Series have since become of increased importance, in connection with theories of the constitution of the atom. 1923 H. L. Brose tr. A. J. W. Sommerfeld Atomic Struct. & Spectral Lines iv. 208 Pickering's series (7) includes only one-half of the lines represented by (7a), namely, those for which k is odd. 1967 W. R. Hindmarsh Atomic Spectra ii. 5 It was first believed that the Pickering series arose from a special form of hydrogen but it is now known to be due to ionized helium. 2002 Astron. & Astrophysics 386 l13 Broad.., low equivalent width..emission lines from the He II Pickering series were clearly detected. < as lemmas |
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